I have Sony KF-60XBR800 since Nov 2002 and is working great. The bulb fused a couple of days ago (Oct 1, 2010). I got the new bulb fixed. However, I am seeing a dark/yellow band at the top and bottom of the screen. It is more striking when I watch black & white DVDs. Are there any service instructions to fix this problem? Any help is very much appreciated. Thanks in advance, Apastambha